JFAS_Vol 13 N 01

Permanent URI for this collectionhttps://archives.univ-eloued.dz/handle/123456789/24341

Browse

Now showing 1 - 20 of 36

NUMERICAL STUDY AND PERFORMANCE OF A DEW POINT EVAPORATIVE COOLER FOR BUILDINGS IN CONSTANTINE, ALGERIA
(university of el oued/جامعة الوادي, 2021-01-01) Abada, D; Rouag-Saffidine, D; Maalouf, C; Polidori, G; Sotehi, O
Due to the ever-growing demand for air-conditioning to bring the indoor air temperature to a comfortable level regardless of the excessive electricity consumption, research is more oriented towards new techniques enabling more energy savings and less adverse environmental impacts. Dew point evaporative cooling systems hold among the most promising because of their ability to reduce the outside air temperature below its wet bulb level while keeping the absolute humidity constant. The current paper aims to report an investigation, which tackles the cool ing cap acity of the system under the Algerian Climate . Constantine city (Algeria) climatic data are retained for the modelling and designing of the system in question. The study involves a variation of its length and air return rate interaction with its ef ficienc y and air temperature supply.
NUMERICAL STUDY AND PERFORMANCE OF A DEW POINT EVAPORATIVE COOLER FOR BUILDINGS IN CONSTANTINE, ALGERIA
(university of el oued/جامعة الوادي, 2021-01-01) Abada, D; Rouag-Saffidine, D; Maalouf, C; Polidori, G
Due to the ever-growing demand for air-conditioning to bring the indoor air temperature to a comfortable level regardless of the excessive electricity consumption, research is more oriented towards new techniques enabling more energy savings and less adverse environmental impacts. Dew point evaporative cooling systems hold among the most promising because of their ability to reduce the outside air temperature below its wet bulb level while keeping the absolute humidity constant. The current paper aims to report an investigation, which tackles the cool ing cap acity of the system under the Algerian Climate . Constantine city (Algeria) climatic data are retained for the modelling and designing of the system in question. The study involves a variation of its length and air return rate interaction with its ef ficienc y and air temperature supply.
EXPERIMENTA L APPROACH TO THE LENGTH OF THE THRESHOLD CONTROLLED HYDRAULIC FLOW IN A RECTANGULAR CHANNEL WITH A ROUGH BOTTOM
(university of el oued/جامعة الوادي, 2021-01-01) ouacer, B. N; K ateb, S; Abd Elouahed, B .
The study proposes to examine, by the experimental route, the effect of roughness on the hydraulic jump length in rectangular channel. A comparative study between the characteristics of the jump controlled by a threshold with a smooth and rough bottom is proposed. The results of this research can be applied in the hydraulic load dissipation basins of dams and also in irrigation lines, using the ability of the projection to raise the water level downstream of the flow.
STUDY AND CONSTRUCTION OF THE SETIF TRAMWAY. AN URBAN PROJECT APPROACH
(university of el oued/جامعة الوادي, 2021-01-01) Kachef, S; Labii, B; Bouzaher, S
The Setif Tramway project is a significant urban project, mobilizing, strategic and innovative, which has upset the urban dynamics of the city, by its insertion on its primary East-West axis, representing its backbone. This paper aims the apprehension of this project as a city project, through its development process, to understand its approach, and to identify a new posture which speaks of a management system, where the process of “Pluralization” responds to strategic orientations which aim at complementarity between the strategy of political actors and the needs of citizen actors. The aim is to speak about the design and development phase of the Setif tram project. Allowing researchers to develop a roadmap for their projects and helping decision-makers to pilot and manage such operations.
DETERMINATION OF TRACE RESIDU E S LEVEL OF PESTICIDES IN SOME VEGETABLES GROWING IN ALGERIA BY GC/µECD AND GC/MS
(university of el oued/جامعة الوادي, 2021-01-01) Mebrouki, S; Zerrouki, H; Belfar, M.L; Douadi, A; Moussaoui, Y
An analytical multiresidue method for the simultaneous determination of various classes of p esticides in vegetables ( tomato , pepper, hot pepper and potato ) was developed. Vegetable samples are extracted with acetonitrile. Final determination was mad e by gas chromatography with µ Electron Capture D etection (µ ECD) for organochloride pesticides . Organophosphorus, pyrithrinoids and other pesticides analysis was carried out by gas chromatography coupled with mass spectrometry in the selected ion monitori ng (SIM) mode. The identification of compounds was based on retention time and on comparison of the primary and secondary ions. Recovery studies were performed at various fortification levels of each compound and the rec overies obtained ranged from 70% to 127 % with relative standard deviations lower than 8 %. The method showed good linearity over the range studied and the detection and quantification limits for the pe sticides studied varied from 0.015 to 0.030 µg.g 1 and 0.05 to 0.1 µg.g 1 , respectively. Th e proposed method was used to determine pesticides levels in peppers , hot pepper and tomatoes grown in multichapelle greenhouses at Biskra region and potato grown at Setif region in Algeria
DYNAMICS OF WHEAT ROOT COLONIZATION BY ARBUSCULAR MYCORRHIZAL FUNGI UNDER CONTRASTING SOIL TILLAGE SYSTEMS AND ITS IMPACT ON GRAIN YIELD
(university of el oued/جامعة الوادي, 2021-01-01) Hadj Youcef Taibi, H; Smail-Saadoun, N; Djemel, A
In this work, we investigated the effect of the soil tillage farming system on the variability of arbuscular mycorrhizal fungi (AMF) root colonization of a local durum wheat variety, conducted during five years of experimental trial in a semi-arid region of eastern Algeria. No tillage farming system improved the AMF symbiotic activity from the fourth year of testing with the appearance of high root percentage of arbuscules at tillering and grain filling stage. Compared to that, the conventional tillage was marked by the observation of a high root percentage of vesicles especially at grain filling. Despite inter-annual fluctuations, the no tillage farming system improved the average yield of the five trial years by 20%. Multiple regressions analyses using the stepwise selection method were made to formulate an equation linking grain yield and the AMF symbiotic components specific to each tillage farming system.
NON-LINEAR BACKSTEPPING SPEED CONTROL FOR ASIAN ELECTRIC SCOOTER USES
(university of el oued/جامعة الوادي, 2021-01-01) Chergui, H; Nasri, A; Korhan, K
The electric scooter has become very popular especially in large European and Asian urban areas, thanks to its some advantages. While its popularity is increasing, studies about these electric scooters are also increasing. The main objective of this study is to introduce the design of an autonomy extended electric three-wheeled scooter. For this aim, a model is obtained firstly and it is driven by two BLDC motors placed on the rear wheels independently controlled by a non-linear controller named as Backstepping. Indeed, it contains a powerful electronic differential system to ensure the security of passenger while entering the curved road. The studied model is simulated through the MATLAB Simulink environment where interesting results are shown in results.
EXPERIMENTAL AND QUANTUM CHEMICAL STUDIES ON MOLECULAR STRUCTURE, SPECTROSCOPIC ANALYSIS, NLO ANALYSIS AND HOMO-LUMO OF SUBSTITUTED N-FERROCENYLMETHYL-N-PHENYLAMIDES
(university of el oued/جامعة الوادي, 2021-01-01) Zegheb, N; Boubekri, C; Lanez, T; Kerassaa, A
This work aims to determine structural, crystal properties and molecular spectroscopy of three N-ferrocenylmethyl-N-phenylamide using DFT method. The computed bond lengths, bond angles and dihedral angles of the titled molecules were calculated and compared with the experimental geometrical parameters, the amount of positive and negative charges using Mulliken charge and the molecular electrostatic potential map (MESP) were also investigated. The theoretical vibrational frequencies were compared with the corresponding experimental data. 1H and 13C NMR spectra were obtained using gauge including atomic orbital (GIAO) method, the calculated and experimental chemical shifts were compared. The dipole moment, linear polarizability and first order hyperpolarizability values were also computed. A study on the electronic properties, HOMO and LUMO energies, were performed by time-dependent DFT (TD-DFT) approach.
THE EFFECT OF STORAGE ON THE NUTRITIONAL VALUE OF ADANSONIA DIGITATA L. LEAVES
(university of el oued/جامعة الوادي, 2021-01-01) Edogbanya, P. R. O; Abah, G; Yaro, C. A
Adansonia digitata L. leaves are used as vegetables in some parts of Africa. However, the leaves are not available all-year-round, so they are usually harvested, dried, and stored. In this research, the effect of storage on some nutritional components of Adansonia digitata leaves was studied. Proximate constituents, antinutrients, vitamins and minerals of leaves were determined using appropriate methods at week 0 (immediately after preparation of sample) and week 4 (after storage). Student’s T-test was used to compare the means of the various parameters measured at week 0 and week 4. The results revealed that powdered dried Adansonia digitata leaves was still viable as a good source of nutrients after four weeks of storage and some of its nutritional constituents were even improved.
INTEGRATION OF THE HISTORIC URBAN STRUCTURE S A SYNTACTIC APPROACH CASE OF THE MEDINA OF BOU SAADA IN ALGERIA
(university of el oued/جامعة الوادي, 2021-01-01) Belouadah, N; Mazouz, S
The traditional built environment of the medina of Bou Saada in Algeria is undergoing harmful attacks, due to an accelerated urban dynamic. The latter having impacts on the life of society. In this study, we questioned ourselves on the preservation of this historic center, and its integration into the urban dynamics of the city, through a syntactic study of urban spaces. The results found highlighted the types of urban spaces that exist in the medina of Bou Saada, each one undergoes an aspect of degradation, either by the reconversion of sever al traditional dwellings, total or partial renovation, or, a state of dilapidation. We have found that the characterization of the urban structure is essential to carry out any intervention at the level of the historic centers, in order to assign more prec ise values to the places, according to the appropriate sociocultural and economic requirements.
WATER WELLS QUALITY ASSESSMENT USING WATER QUALITY INDEX FOR THE PURPOSES OF DRINKING OF M’ZAB WADI REGION
(university of el oued/جامعة الوادي, 2021-01-01) Benabderrahmane, H; Baba Amer, Z
The prese nt work aims to assess the groundwater quality using Water Quality Index (WQI which can be considered as major factor for cont rolling quality of water with regarded to drinking purposes . Water qualit y index is used to illustrate the general state of water quality in a single number . This study concerns specifically Daia area upstream region of M' z ab valley. Water samples have been collected at eighteen groundwater points in two year s 2016 and 2017. Then, different parameters a re analyzed and compared with Algerian standards for drinking water The hydrochemical study shows significant variations in physico c hemical measurement Also, t he obtained results of the water quality index in Daia region sh ow an excellent ranking with 94%, 88% in years respectively
WATER WELLS QUALITY ASSESSMENT USING WATER QUALITY INDEX FOR THE PURPOSES OF DRINKING OF M’ZAB WADI REGION
(university of el oued/جامعة الوادي, 2021-01-01) Benabderrahmane, H; Baba Amer, Z
The prese nt work aims to assess the groundwater quality using Water Quality Index (WQI which can be considered as major factor for cont rolling quality of water with regarded to drinking purposes . Water qualit y index is used to illustrate the general state of water quality in a single number . This study concerns specifically Daia area upstream region of M' z ab valley. Water samples have been collected at eighteen groundwater points in two year s 2016 and 2017. Then, different parameters a re analyzed and compared with Algerian standards for drinking water The hydrochemical study shows significant variations in physico c hemical measurement Also, t he obtained results of the water quality index in Daia region sh ow an excellent ranking with 94%, 88% in years respectively
EXPERIMENTA L APPROACH TO THE LENGTH OF THE THRESHOLD CONTROLLED HYDRAULIC FLOW IN A RECTANGULAR CHANNEL WITH A ROUGH BOTTOM
(university of el oued/جامعة الوادي, 2021-01-01) N ouacer, B; K ateb, S; Abd Elouahed, B
The study proposes to examine, by the experimental route, the effect of roughness on the hydraulic jump length in rectangular channel. A comparative study between the characteristics of the jump controlled by a threshold with a smooth and rough bottom is proposed. The results of this research can be applied in the hydraulic load dissipation basins of dams and also in irrigation lines, using the ability of the projection to raise the water level downstream of the flow.
IMPOSTERS ANOMALY DETECTION
(university of el oued/جامعة الوادي, 2021-01-01) Tazerouti, A.; Ikram, A
Over the last two decades the world of cyber security has grown immensely, but despite the state-of-the-art security detection systems and intrusion detection systems (IDSs), unwanted malicious users still find their way around these security measures and gain access to secure systems. This study consists of shedding some light on the security issues in the intrusion detection systems, their vulnerabilities and drawbacks. A hypothesis is proposed to help mitigate these issues and obtain a fast and a more precise method for the detection of different malicious intruders and imposters, study their behavior and make a statistical comparison of data from the used IDSs and throughout the process. This study will state the current available technologies of IDSs, site their challenges and implement a new software-based methodology to increase the detection and reduce false alarm rates for the IDS.
CHECKLIST, DIVERSITY AND DISTRIBUTION OF WILD BEES (HYMENOPTERA: APOIDEA ; ANTHOPHILA ) ACROSS TLEMCEN MOUNTAINS, IN THE NORTH WEST OF ALGERIA.
(university of el oued/جامعة الوادي, 2021-01-01) Ouahab, Y; Bendifallah, L
Our study concerns the diversity and distribution of wild bees through three sites in the Tlemcen mountains. T he present paper contains a che cklist of 155 taxa with three new records for the Apoid fauna of Algeria. These are Andrena marginata Fabricius, 1776, Anthidium manicatum Dallatour, 1877 and Megachile latimanus Say, 1823. The index study and the statistical treatments applied to th e r esu lts made it possible to highlight the composition of this fauna, its dependence on floral resources and its spatio temporal distribution across the region . The results obtained reveal a high richness of Apoids in this region, the conservation of whic h i s n ecessary in the future as this fauna plays a key role in the pollination of plants and their diversity within natural and agricultural ecosystems.
NUMERICAL APPROXIMATION OF BLACK SCHOLES STOCHASTIC DIFFERENTIAL EQUATION USING EULER-MARUYAMA AND MILSTEIN METHODS
(university of el oued/جامعة الوادي, 2021-01-01) Nwachukwu, O. O
This paper will introduce the Ito’s lemma used in the stochastic calculus to obtain the Ito-Taylor expansion of a stochastic differential equations. The Euler-Maruyama and Milstein’s methods of solving stochastic differential equations will be discussed and derived. We will apply these two numerical methods to the Black-Scholes model to obtain the values of a European call option of a stock at discretized time intervals. We will use a computer simulation to approximate while using the Ito’s formula to obtain the exact solution. The numerical approximations to the exact solution to infer on the effectiveness of the two methods.
ASSESSMENT OF THE ELECTRICITY GENERATION, DESALINATION, AND WASTEWATER TREATMENT EFFICIENCIES OF A MICROBIAL DESALINATION CELL OPERATING WITH ELECTROLYTE DILUTION AS PH CONTROL MEASURE
(university of el oued/جامعة الوادي, 2021-01-01) Imoro1, A. Z; Moses, M; Buamah, R
In this study, the dilution of anolyte and catholyte as a pH control measure in a newly developed microbial desalination cell (MDC) was explored. Also, the effects of dilution on the newly developed MDC’s electricity generation, desalination and wastewater treatment efficiencies were assessed against a three-chamber MDC which used potassium phosphate buffer for pH control. On the average, the newly developed MDC exhibited a lower buffer capacity (pH change of 1.73 ± 0.06) as compared to the relatively higher buffer capacity (pH change of 1.49 ± 0.07) of the three-chamber MDC. However, the newly developed MDC produced a higher desalination efficiency of 50.01% compared to the 46.66% produced by the three-chamber MDC and a higher power density of 0.62 ± 0.13 W/m3 than the 0.35 ± 0.70 W/m3 produced by the three-chamber MDC. It’s COD reduction efficiency (63.21%) was also higher than the 42.81% produced by the three-chamber MDC.
GROUNDWATER POLLUTION RISK IN THE REGION OF BOUIRA (NORTH CENTER OF ALGERIA): ORIGIN AND CONSEQUENCES ON HEALTH
(university of el oued/جامعة الوادي, 2021-01) Rezig, A; Saggai, S; Baloul, D; Dahmani, S
Groundwater is often the preferred source for human consumption, irrigation and industry. In Algeria, many people count on well water for their drinking water supply and irrigation of agricultural lands; especially in ru r al areas, which is a strategic reserve of which quality must be assured. Groundwater protection requires the detection of origins of pollution and its consequences on the ecological system. The region of Bouira has seen water borne diseases occurrence cau s ed by groundwater pollution, which has led us to look for the origin of this problem. It is considered like a high risk area because it has recorded a large number of Toxi food collective, Viral Hepatitis A, typhoid fever and Choléra cases in 2018. The st u dy carried out based on the potential risks to human health and the GIS for a period of eight years (from 2008 to 2015), has allowed us to the elaboration of water borne disease mapping of the whole region and to find that the most affected municipalities are: Bouira, Sour El Ghozlene, Lakhdaria and Ain Bessem .The correlation between these diseases and the irrigated perimeters by wadis is very strong in this municipalities.
IMPROVING AIR NAVIGATION AT CHLEF AERODROME BY IMPLEMENTING A N EW INSTRUMENT LANDING SYSTEM ILS
(university of el oued/جامعة الوادي, 2021-01-01) B oudani, A; ergheul, B; elkheir, B; ttatfa, A
This work presents the study of the improving air navigation at chlef aerodrome by I mplementing a new I nstrument L anding S ystem (ILS) ILS). At present, th e radio navigation systems at Chlef aerodrome can handle the air traffic load adequately (air traffic controllers are able to manage the airspace for which they are responsible ). Nevertheless, in the very near future the traffic load will become so importa nt that it will require the implementation of an ILS beacon. To this reason , we will study the current situation, which is based on a general presentation of Chlef aerodrome (the situation and position of the airspace, and the existing airport infrastructu re ), followed by the choice of equipment to be installed and the method of implenting the ILS system (composition, technical characteristics and arrangements), in accordance with standards and recommended practices. From these results we can find: Implemen ta tion of glide path (GP) on the runway 26 , i mplementation of the localizer on the runway 26, s etting a new equipment DME . The previous systems contribute largely for improving the air navigation at the aerodrome of Chlef
POTENTIAL IN VITRO INHIBITORY EFFECT S OF MORINGA OLEIFERA LEAF EXTRACTS ON EXTENDED SPECTRUM β LACTAMASE PRODUCING BACTERIA
(university of el oued/جامعة الوادي, 2021-01-01) Garba, L; Muhammad, B; Adamu, M.T S. Isa.; Yarma, A. A
Extended spectrum β lactamase (ESβL) enzymes are produced by certain bacteria as a m ech anism of resi stance to β lactam and extended spectrum β lactam antibiotics. Previous investigations have confirmed that M. oleifera contains several bioactive compounds . This study aimed at evaluating the in vitro antibacterial effects of ethanolic and met hanolic leaf extracts of M. oleifera on extended spectrum β lactamase producing bacteria. The leaf ext racts of the plant w ere prepared, screened for bioactive compounds and evaluated for in vitro inhibitory effects against the ESβL producing bacteria us ing agar well diffusion method. Different phytochemical s were detected from the extracts Bot h methanolic and ethanolic leaf extracts showed a high inhibitory activity, which increased with an increase in concentration, from lowest to highest based on the zon es of growth inhibition produced. Amongst the test organisms, Klebsiella pneumoniae was the most sensitive isolate to methanolic extract at 200, 100, 50 and 25 mg/mL followed by Escherichia coli , and then Proteus mirabilis . However, in terms of the etha nol ic extract using the same concentrations as those of m ethanol extracts, E. coli was found to be the most sensitive isolate followed by K. pneumoniae and then P. mirabilis .

Browse

Recent Submissions